landmark
Americannoun
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a prominent or conspicuous object on land that serves as a guide, especially to ships at sea or to travelers on a road; a distinguishing landscape feature marking a site or location.
The post office served as a landmark for locating the street to turn down.
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something used to mark the boundary of land.
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a building or other place that is of outstanding historical, aesthetic, or cultural importance, often declared as such and given a special status landmark designation, ordaining its preservation, by some authorizing organization.
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a significant or historic event, juncture, achievement, etc..
The court decision stands as a landmark in constitutional law.
verb (used with object)
noun
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a prominent or well-known object in or feature of a particular landscape
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an important or unique decision, event, fact, discovery, etc
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a boundary marker or signpost
Other Word Forms
Etymology
Origin of landmark
before 1000; Middle English; Old English landmearc. See land, mark 1
Explanation
A landmark is anything that helps you know where you are — in space, in time, in history. If you’re sailing from Europe to New York, the Statue of Liberty will be the landmark that lets you know you’re in the right port. If you’re walking to your cousin’s house, the pizza shop on the corner is the landmark that lets you know you just have two blocks to go. Getting your driver’s license is a landmark event, as was the Revolutionary War — though which battle was harder is yours to determine.
Vocabulary lists containing landmark
50th Anniversary of the March on Washington: "Trying to Inspire a New Generation" by Trip Gabriel
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Claudette Colvin: Twice Toward Justice
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This Week in Words: Current Events Vocab for January 15–January 21, 2022
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
On 1 April, 2026, a landmark revision to Japan's Civil Code took effect, allowing divorced couples to share custody of their children.
From BBC • May 23, 2026
It was there that Hassabis co-designed “Theme Park,” a landmark game with bleeding-edge algorithmic capabilities that earned both critical acclaim and millions of sales.
From MarketWatch • May 23, 2026
The Supreme Court handed down a landmark decision last summer in U.S. v.
From Salon • May 22, 2026
With a fresh filing, SpaceX showed the path to a landmark IPO likely to mint Elon Musk as the world’s first trillionaire.
From The Wall Street Journal • May 21, 2026
If true, this story deserves to rank alongside the Missouri Compromise and the Compromise of 1850 as one of the landmark accommodations in American politics.
From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.